Image display apparatus, image display system, and image display method

ABSTRACT

In an image display system which has a management station for saving, in a server, management data that contains at least names, identification numbers, and connection numbers of image sensing devices, and is described in the data description language, and the display style of the management data, and a display device, and which displays a video obtained from an arbitrary one or more image sensing devices connected, the management data of the image sensing devices is read out from the server, the display style of the readout management data is read out from the server, and an image is generated and displayed by applying the management data to the display style.

FIELD OF THE INVENTION

The present invention relates to an image display apparatus, imagedisplay system, and image display method for selecting an arbitrary oneof a plurality of cameras connected, and displaying an image captured bythe selected camera.

BACKGROUND OF THE INVENTION

A monitor system using video cameras requires an optimal monitorterminal layout depending on the purpose intended and the number ofcameras.

In a conventional monitor system of this type, since analog videosignals from cameras are directly displayed on video monitors, videosare determined by the physical layout of monitors. The layout of acontrol panel used to make various operations for cameras is determinedby the physical layout of switches upon manufacture.

In recent years, in a monitor system that exploits a GUI (graphical userinterface) of a computer, a control panel and video monitors aregraphically displayed on the computer screen, and are operated using apointing device such as a mouse or the like. For this reason, the windowconfiguration such as the video display style, control panel layout, andthe like can be changed by modifying programs and scripts.

However, in such conventional image display apparatus, since an expertprogrammer must modify programs, scripts, or page description to changethe window configuration, end users cannot easily modify the windowconfiguration.

For this reason, upon introducing a monitor system having a windowconfiguration suitable for the purpose intended, high cost is requiredto hire an expert programmer for programming.

SUMMARY OF THE INVENTION

The present invention has been made in consideration of the abovesituation, and has as its object to provide an image display apparatus,image display system, and image display method, which allow an end userto easily change the window configuration, and can realize with low costthe window configuration suited to the purpose intended.

According to the present invention, the foregoing object is attained byproviding an image display apparatus for selecting an arbitrary imagesensing device from one or more image sensing devices connected, anddisplaying a video obtained from the selected image sensing device,comprising first memory for holding management data which contains atleast a name, identification number, and connection information of eachimage sensing device, and is described in a data description language;second memory for holding a display style of the management data, whichis described in a style designation language; and data description meansfor describing management data in the data description language, andstoring the data in the first memory.

According to the present invention, the foregoing object is alsoattained by providing an image display system comprising one or moreimage sensing devices; first memory for holding management data whichcontains at least a name, identification number, and connection numberof each image sensing device, and is described in a data descriptionlanguage; second memory for holding a display style of the managementdata, which is described in a style designation language; datadescription means for describing management data in the data descriptionlanguage, and storing the data in the first memory; means for readingout the management data from the first memory; means for reading out thedisplay style from the second memory; and a data display unit fordisplaying by applying the readout management data to the readoutdisplay style.

Further, the foregoing object is also attained by providing theapparatus, wherein a function of the image sensing device includes atleast one of a pan angle, tilt angle, zoom ratio, and image quality, andcan be controlled, and the display style of the management data includesa style of an operation display for controlling the function.

Furthermore, the foregoing object is also attained by providing an imagedisplay method for selecting an arbitrary image sensing device from oneor more image sensing devices connected, and displaying a video obtainedfrom the selected image sensing device, comprising the windowconfiguration step of presenting inquiries in turn, determining aconfiguration of an image display window suitable for a purpose intendedon the basis of answers to the inquiries, and outputting windowconfiguration information; and the window generation step of generatinga display window on the basis of the window configuration information.

Further, the foregoing object is also attained by providing an imagedisplay apparatus for selecting an arbitrary image sensing device fromone or more image sensing devices connected, and displaying a videoobtained from the selected image sensing device, comprising windowconfiguration means for presenting inquiries in turn, determining aconfiguration of an image display window suitable for a purpose intendedon the basis of answers to the inquiries, and outputting windowconfiguration information; and window generation means for generating adisplay window on the basis of the window configuration information.

Further, the foregoing object is also attained by providing a windowconfiguration method for configuring a window for displaying a videoobtained from an arbitrary image sensing device out of image sensingdevices connected, comprising the steps of outputting a window patternlist to an external device; outputting a list of the image sensingdevices connected, to the external device; receiving informationindicating a window pattern selected from the window pattern list fromthe external device; receiving information indicating at least one imagesensing device selected from the list of the image sensing devicesconnected, from the external device; generating an image display windowon the basis of the window pattern and the information indicating theimage sensing device received from the external device; and storing thegenerated image display window.

Further, the foregoing object is also attained by providing a windowconfiguration method for configuring a window for displaying a videoobtained from an arbitrary image sensing device out of image sensingdevices connected, comprising the steps of requesting a window patternlist from an information processing apparatus to a window configurationapparatus; outputting the window pattern list from the windowconfiguration apparatus to the information processing apparatus inresponse to the request; displaying the window pattern list in theinformation processing apparatus; selecting a window pattern from thedisplayed window pattern list; transmitting the selected window patternfrom the information processing apparatus to the window configurationapparatus; requesting a list of the image sensing devices connected,from the information processing apparatus to the window configurationapparatus; outputting the list of the image sensing devices connected,from the window configuration apparatus to the information processingapparatus in response to the request; displaying the list of the imagesensing devices in the information processing apparatus; selecting atleast one image sensing apparatus from the displayed list of the imagesensing devices; transmitting information indicating the selected imagesensing device from the information processing apparatus to the windowconfiguration apparatus; configuring an image display window on thebasis of the transmitted window pattern and information indicating theimage sensing device in the window configuration apparatus; and storingthe generated image display window in the window configurationapparatus.

Further, the foregoing object is also attained by providing a windowconfiguration apparatus for configuring a window for displaying a videoobtained from an arbitrary image sensing device out of image sensingdevices connected, comprising first memory for storing a window patternlist; second memory for storing a list of image sensing devicesconnected; transmission means for outputting the window pattern list andthe list of the image sensing devices connected, to an external device;reception means for receiving information indicating a window patternselected from the window pattern list and information indicating atleast one image sensing device selected from the list of the imagesensing devices connected, from the external device; window generationmeans for generating an image display window on the basis of the windowpattern and the information indicating the image sensing device receivedfrom the external device; and third memory for storing the generatedimage display window.

Other features and advantages of the present invention will be apparentfrom the following description taken in conjunction with theaccompanying drawings, in which like reference characters designate thesame or similar parts throughout the figures thereof.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of the specification, illustrate embodiments of the invention and,together with the description, serve to explain the principles of theinvention.

FIG. 1 is a diagram showing an arrangement of a remote monitoring systemaccording to the first embodiment of the present invention;

FIG. 2 shows an example of a window (monitoring window) of a monitoringstation;

FIG. 3 is a block diagram showing the arrangement of a personalcomputer;

FIG. 4 is a diagram of software programs and data used in the monitoringstation according to the first embodiment of the present invention;

FIG. 5 is a flow chart showing the process of a Web browser upongenerating the monitoring window according to the first embodiment ofthe present invention;

FIG. 6 is a flow chart showing the process of the Web browser upongenerating a video viewer according to the first embodiment of thepresent invention;

FIG. 7 is a diagram of software programs and data according to the firstembodiment of the present invention;

FIG. 8 shows an execution window of a camera management tool accordingto the first embodiment of the present invention;

FIG. 9 shows an example of an inquiry window of a monitoring wizardaccording to the first embodiment of the present invention;

FIG. 10 is a flow chart showing an example of an inquiry flow of themonitoring wizard according to the first embodiment of the presentinvention;

FIG. 11 shows an example of choices of basic styles of the monitoringwindow according to the first embodiment of the present invention;

FIG. 12 shows an example of a window when accessing to a cameramanagement tool according to a second embodiment of the presentinvention;

FIG. 13 shows an example of a window for adding a camera according tothe second embodiment of the present invention;

FIG. 14 shows an example of a window of a monitoring wizard according tothe second embodiment of the present invention;

FIG. 15 is a flow chart showing an example of an operation of themonitoring wizard according to the second embodiment of the presentinvention; and

FIG. 16 is a diagram of an example of a window showing a monitoringwindow list according to the second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Preferred embodiments of the present invention will be described indetail in accordance with the accompanying drawings.

First Embodiment

FIG. 1 is a diagram of a remote monitoring system according to the firstembodiment of the present invention.

Reference numeral 1 denotes pan/tilt/zoom-controllable cameras; and 2,network camera adapters each of which converts a video signal input fromthe corresponding camera 1 into digital data, compresses the digitaldata by Motion-JPEG, and sends the compressed data onto a network. Also,each network camera adapter 2 controls the corresponding camera 1 viaserial communications on the basis of control commands received from thenetwork. Reference numeral 3 denotes a network that transports theInternet protocol. A plurality of sets of cameras 1 and network cameraadapters 2 (to be referred to as “camera stations” hereinafter) areconnected to the network 3. The cameras 1 and network adapters 2 mayinclude different models.

Each network adapter 2 is preferably compatible to a network deviceautomatic detection protocol such as Universal Plug and Play (UPnP) orthe like.

Reference numeral 4 denotes a monitoring station using a personalcomputer. The monitoring station 4 receives video signals from thenetwork camera adapters 2 via the network 3, and decodes and displaysthem. The monitoring station 4 sends camera control commands for the panand tilt angles and the zoom ratio to each network camera adapter 2 inaccordance with operations of a mouse, joystick, keyboard, and the like.A plurality of monitoring stations 4 may be also connected to thenetwork 3, although not shown in FIG. 1.

Reference numeral 5 denotes a management station using a personalcomputer; and 6, a server using a personal computer. The managementstation 5 manages information such as the names, network addresses,types, and the like of camera stations connected to the network 3, andsaves management data in the server 6 in the XML format. Also, themanagement station 5 designs the monitoring window to be displayed oneach monitoring station 4, and saves in the server 6 window style datain the XSL format and video layout data, camera layout (camera map)data, and the like in the XML format. Note that these dataconfigurations will be explained in detail later with reference to FIG.4.

The server 6 can be either a Web server or file server.

Also, one or any combinations of the monitoring station 4, managementstation 5, and server 6, or all of them may be realized by a singlepersonal computer.

FIG. 2 shows an example of the window (monitoring window) on themonitoring station 4 according to the first embodiment. Referencenumeral 21 denotes a video viewer for displaying a video signal from agiven camera; 22, a map viewer for displaying a camera map; and 23, 24,and 25, scroll bars respectively used to control the pan angle, tiltangle, and zoom ratio of the camera. Reference numerals 26 and 28 denotecamera icons each indicating a given camera on the camera map; and 27and 29, scope icons respectively indicating the image sensing directionand range of the camera. When a camera is switched by clicking thecamera icon 26 or 28, a video signal obtained from a desired camera canbe displayed. By operating the scope icon 27, the pan angle, tilt angle,and zoom ratio of the camera can be controlled.

In addition to these operation buttons, operation members for backlightcorrection, preset selection, snap shot (to instruct to capture a stillimage), panoramic display, and the like may be provided.

FIG. 3 is a block diagram showing the arrangement of a general personalcomputer used as the monitoring station, management station, and server.

Reference numeral 31 denotes a CPU for systematically controlling theentire computer; 32, a main memory (RAM); 33, a removable externalstorage device such as a floppy disk, CD-ROM, or the like; 34, asecondary storage device such as a hard disk or the like; 35, a mouseserving as a pointing device; 36, a keyboard; 37, a network interface;38, a video board; and 39, a monitor.

FIG. 4 is a diagram of software programs and data used in the monitoringstation 4. As described above, data are generated and updated by themanagement station 5, and are stored in the server 6.

Reference numeral 41 denotes a Web browser which can display a stylesheet file described in the style designation language XSL by applyingit to a data file described in the data description language XML. TheWeb browser 41 can execute plug-in programs of Java, ActiveX, and thelike, and script programs of ECMAScript.

Reference numeral 42 denotes a main style sheet file that describes thedisplay style and operation responses of the entire monitoring window;43, a map viewer style sheet file that describes the display style andoperation responses of the map viewer 22 in the XSL and ECMAScriptformats; and 44, a video viewer style sheet file that describes thedisplay style and operation responses of the video viewer 21. Aplurality of kinds of style sheet files are prepared in correspondencewith the monitoring purposes and job patterns used.

Reference numeral 45 denotes a main data file that describes displayoption data of the entire monitoring window; 46, a map data file thatdescribes the camera map data for the map viewer 22; 47, a video viewerdata file that describes display option data of the video viewer; and48, a camera list data file that describes management data and link dataof all camera stations.

Reference numeral 49 denotes a video display program module in theActiveX or Java applet format; and 410, bitmap image data files to berendered on the camera map.

The main data file 45 designates the main style sheet file 42 as a stylein the form of a link. Also, the main data file 45 describes links tothe map data file 46 and camera list data file 48 to use them as mapdata and camera list data, respectively.

The map data file 46 designates the map viewer style sheet file 43 as astyle in the form of a link. Also, the map data file 46 describes areference designation for referring to data of the camera list data file48, the link to which is designated in the main data file 45.

The camera list data file 48 describes management data of, e.g., thenames, network addresses, types, and the like of camera stations foreach camera 3 connected to the network 3, and a link to the video viewerstyle sheet file 44 to be used.

The video viewer style sheet file 44 describes a link to the videodisplay program module 49 to be used.

FIG. 5 is a flow chart showing the process of the Web browser 41 upongenerating the monitoring window.

The Web browser 41 acquires and reads the main data file 45 from theserver 6 (step S51).

The Web browser 41 then acquires and reads the main style sheet file 42designated by the link as a style from the server 6 (step S52). The Webbrowser 41 then interprets the main style sheet file 42, and interpretsthe main data file 45 in accordance with a conversion designationdescribed in the XSL format, thus starting generation of the monitoringwindow (step S54).

In this generation process, the Web browser 41 acquires and reads thecamera list data file 48 designated by the link from the server 6 (stepS55).

The Web browser 41 acquires and reads the map data file 46 designated bythe link from the server 6 to display it as a camera map (step S56). TheWeb browser 41 acquires and reads the map viewer style sheet file 43designated as a style by the link from the server 6 (step S57). The Webbrowser 41 then interprets the map viewer style sheet file 43, andinterprets the map data file 46 in accordance with a conversiondesignation described in the XSL format, thus starting generation of themap viewer window (step S58).

During this process, the Web browser 41 acquires and reads bitmap files410 from the server 6 as needed on the basis of a link to a backgroundbitmap file and the display positions of the camera icons described inthe map data file 46, and renders a basic map (step S59). The Webbrowser 41 searches data of the camera list data file 48 for the namesor the like of cameras corresponding to camera IDs described in the mapdata file 46, and displays them on the map (step S60).

FIG. 6 is a flow chart showing the process of the Web browser 41 upongenerating the video viewer 21.

When the user has clicked the camera icon 26 or 28 on the map viewer 22using the mouse, the Web browser 41 executes a script functionarithmetic operation of the corresponding camera, which is described inthe map viewer style sheet file 43 (step S61). Furthermore, the Webbrowser 41 executes a script function arithmetic operation described inthe main style sheet file 42 (step S62).

During this process, the Web browser 41 searches data of the camera listdata file 48 for a link to the video viewer style sheet file 44 suitablefor the camera corresponding to the camera ID of the clicked cameraicon, and acquires and reads that video viewer style sheet file 44 fromthe server 6 (step S63). The Web browser 41 then acquires and reads thevideo viewer data file 47 from the server 6 (step S64). The Web browser41 then interprets the video viewer style sheet file 44, and interpretsthe video viewer data file 47 in accordance with a conversiondesignation described in the XSL format, thus starting generation of theviewer window (step S65).

The Web browser 41 then acquires and reads the video display programmodule 49 in accordance with the link described in the video viewerstyle sheet file 44 (step S66) The Web browser 41 searches data of thecamera list data file 48 for connection information such as a TCP/IPaddress or the like corresponding to the camera ID of the camera to bedisplayed (step S67). The Web browser 41 designates the found connectioninformation to start execution of the video display program module (stepS68). In this process, the video display program module connects thecorresponding camera station by TCP/IP, and acquires and displays avideo signal from the camera (step S69).

As described above, in the first embodiment, the Web browser 41dynamically generates and displays the monitoring window on the basis ofvarious style sheet files and data files stored in the server 6 or inaccordance with operations.

For this reason, when a style sheet file is replaced by another one, thedisplay style of the monitoring window can be changed. Also, by changingdata files, the monitoring window having a given display style can begenerated for different camera layouts and arrangements.

The data generation/update process in the management station 5 shown inFIG. 4 will be explained below.

FIG. 7 is a diagram showing software programs and data of the managementstation 5.

Reference numeral 71 denotes a camera management tool for managing aninformation list of the names, identification numbers, network addresses(connection information), types, and the like of camera stationsconnected to the network 3. The camera management tool 71 extractsinformation on the camera list data file 48, and saves that file in theserver 6.

Reference numeral 72 denotes a map editor for editing a camera map. Themap editor 72 edits the positions of camera icons, background bitmap,and the like on the map, and extracts information on the edited contentson the map data file 46 and saves that file in the server 6.

Reference numeral 73 denotes a monitoring wizard for automaticallyconfiguring the monitoring window by presenting inquiries in turn in awizard pattern. The monitoring wizard 73 extracts the configurationresult on the main data file 45 (FIG. 4) and video viewer data file 47,and saves these files in the server 6.

FIG. 8 shows an execution window of the camera management tool 71.

Referring to FIG. 8, reference numeral 81 denotes a list display sectionfor displaying a list of information of registered camera stations; 82,an addition button for additionally registering new camera stationinformation; 83, a rename button used to change the name of a camerastation; 84, a delete button for deleting the registered camera stationinformation; and 85, an automatic detection button for automaticallydetecting a camera station connected to the network by a network deviceautomatic detection protocol such as Universal Plug and Play (UPnP) orthe like.

When a camera station is automatically detected upon depression of theautomatic detection button 85, the camera management tool 71 acquires adevice information file in the XML format from that camera station. Thecamera management tool 71 copies link information to a video viewerstyle sheet file 44 to be used for that camera station, which isdescribed in the device information file, to the camera list data file48.

Reference numeral 88 denotes a property dialog used to input camerastation information; 86, an address field used to input the networkaddress of the camera station; and 87, a type compo box for designatingthe type of camera station.

FIG. 9 shows an example of an inquiry window of the monitoring wizard.

Reference numeral 91 denotes a “next” button used to go to the nextinquiry; 92, a “back” button used to go back to the immediatelypreceding inquiry; 93, a cancel button used to cancel the monitoringwizard; and 94, option buttons used to select an answer to the inquiryfrom some choices.

FIG. 10 is a flow chart showing an example of the inquiry flow of themonitoring wizard.

On the first page of the wizard, it is inquired if a new monitoringwindow is to be created or the existing window is to be edited (stepS101). If the existing window is to be edited, the flow jumps to anexisting window edit process in step S109 and subsequent steps. On theother hand, if a new monitoring window is to be created, the basic styleof the monitoring window is inquired to obtain the basic style (stepS102). A camera to be used of those registered in the camera managementtool is inquired to specify the camera to be used (step S103). It isthen inquired if the basic style uses a camera map (step S104). If thebasic style is of a type which uses a camera map (YES in step S104), thedisplay style of the camera map is inquired to obtain the display style(step S105). Note that this dialog has a button for launching the mapeditor to edit the camera map. If the camera map is not used (NO in stepS104), the flow jumps to step S106.

It is inquired in step S106 if the basic style is of fixed display typeor index window type. If the index window type is selected, the displayposition of the camera is inquired to obtain the display position (stepS107). If the fixed display type is selected, since the display positionis fixed in position, the flow jumps to step S108. Finally, the imagequality and frame rate of an image to be displayed are inquired toobtain the image quality and frame rate (step S108).

If the existing window is to be edited, the window to be edited isselected from the existing windows in step S109. If it is determinedthat a camera is to be added (YES in step S110), the camera to be addedis selected in step S111. If a camera is to be deleted (YES in stepS112), the camera to be deleted is selected in step S113. It is checkedin step S114 if the style used uses a camera map. If the style uses acamera map, it is confirmed in step S115 if the map style is to bechanged. If the map style is to be changed (YES in step S115), thedisplay style of the camera map is inquired in step S116 to obtain thedisplay style. Note this dialog comprises a button for launching the mapeditor to edit the camera map. It is inquired in step S117 if the styleused is of fixed display type or index window type. If the index windowtype is selected, it is inquired in step S118 if the display position ofthe camera is to be changed. If the display position of the camera is tobe changed, the display position is obtained in step S119. Finally, itis inquired if the image quality and frame rate of an image to bedisplayed are to be changed, and if they are to be changed, the imagequality and frame rate are obtained in step S121.

After the user answers the aforementioned inquiries and presses a finishbutton, the monitoring wizard 73 generates the main data file 45, videoviewer data file 47, and map data file 46 as needed, and saves them inthe server 6. At this time, a link to the main style sheet file 42corresponding to the basic style selected in step S102 is written in themain data file 45 as a style.

FIG. 11 shows an example of choices of basic styles of the monitoringwindows to be selected in step S102.

Reference numeral 111 denotes a floor type camera map+video style alsoshown in FIG. 2; 112, a wide-area type camera map+video style; 113, acamera list+video style; 114, a floor map+4-video fixed display style;115, a 4-video fixed display style; 116, a 6-video fixed display style;117, a 1-video full-screen style; and 118, an index window+video style.Note that the present invention is not limited to the styles shown inFIG. 11, and various other styles may be used.

In the first embodiment, the display position, image quality, and framerate of each camera can be changed. However, the present invention isnot limited to such specific embodiment, and various display propertiesmay be selected using different display styles.

As described above, according to the first embodiment of the presentinvention, since an end user can easily change the window configuration,a window configuration suitable for the purpose intended can be realizedwith low cost.

Second Embodiment

The second embodiment of the present invention will be explained next.

In the first embodiment, a window is configured using an exclusivesoftware tool for supporting configuration of window stored in themanagement station 5 and management data stored in the server 6.Whereas, a case where the server 6 stores a software tool is explainedin the second embodiment. Specifically, data used for monitoring in themonitoring stations 4 is generated and updated by a management serviceserver 6, and stored in the management service server 6 along withsoftware. In order to more clearly express the difference between thefirst and second embodiments, the server 6 for storing software tool iscalled “management service server 6”, and the management station 5 whichno longer stores software tool is called “management client”.

Further, the operation of the monitoring stations 4 are the same as thatexplained in the first embodiment with reference to FIG. 2 and FIGS. 4to 7 except that the necessary program and data are read from themanagement service server 6 instead of the management station.Therefore, the explanation of the operation is omitted here.

Below, the configuration and operation according to the secondembodiment are explained mainly for the difference between the first andsecond embodiments.

A configuration of a remote monitoring system according to the secondembodiment is similarly to that shown in FIG. 1; however, a Web serveris running on the management service server 6 which provide managementservice of the monitoring system via a network, such as Internet. Themanagement client 5 accesses to the management service server 6 using aWeb browser thereby it is capable to enjoy the provided service. It isunnecessary to install a special software in the management client 5upon using the provided service, and a general monitoring manager caneasily generate a monitoring window and manage the system.

It should be noted that the monitoring station 4 and the managementclient 5 may be implemented by a single personal computer.

FIG. 12 shows an example of a window when the management client 5accesses to the camera management tool 71 using a Web browser.

Referring to FIG. 12, reference numeral 121 denotes a list displaysection for displaying a list of information of registered camerastations; 122, an addition button for additionally registering newcamera station information; 123, a rename button used to change the nameof a camera station; 124, a delete button for deleting the registeredcamera station information; 125, an automatic detection button forautomatically detecting a camera station connected to the network by anetwork device automatic detection protocol such as UPnP or the like.When the addition button 122 is depressed, a window for adding a camerais displayed.

FIG. 13 shows an example of a window for adding a camera. Referencenumeral 131 denotes an input section for inputting a network address ofa camera station; 132, an input section for inputting a name of thecamera station; and 133, a finish button for completing inputprocessing. When the finish button 133 is depressed under the state thatan appropriate network address and name is inputted, the managementclient 5 sends the network address and name to the management serviceserver 6. When the management service server 6 receives the information,it adds a new camera in the camera station list.

Further, when the automatic detection button 125 shown in FIG. 12 isdepressed, the management client 5 automatically detects camera stationor stations in accordance with the script description embedded in awindow display program of the camera management tool 71, and acquires adevice information file in the XML format. The camera management client5 then transfers to the device information file to the managementservice server 6. When the management service server 6 receives theinformation, it adds a new camera station in the camera list data file48.

FIG. 14 shows an example of a window when the management client 5accesses to the monitoring wizard 73 (FIG. 7) using a Web browser.Reference numeral 141 is a “next” button used to go to the next inquiry;142, a “back” button used to go back to the immediately precedinginquiry; and 143, a cancel button used to cancel the monitoring wizard.Reference numerals 144 a and 144 b denote lists of monitoring windowtypes and formats, respectively, for a user to select one from eachlist.

FIG. 15 is a flow chart showing an example of an operation of themonitoring wizard 73. First, the management client 5 accesses to thefirst window (displaying a window type list) of the monitoring wizard,and requests the window (step S201). The management service server 6sends a window of lists of monitoring window types and formats inresponse to the request (step S202). The management client 5 receivesthe lists and display them (step S203).

Next, the management client 5 sends ID indicating the type of windowselected by the user to the management service server 6 (step S204). Themanagement service server 6 receives the sent ID (step S205) and sends alist of camera stations (step S206).

The management client 5 receives and display the list of camera stations(step S207). Thereafter, the management client 5 sends ID indicating acamera station selected by the user to the management service server 6(step S208). The management service server 6 receives the ID of thecamera station (step S209), generates the main data file 45, videoviewer data file 47, and map data file 46 as needed based on the ID ofthe monitor type and ID of the camera station, and stores these files(step S210). At this time, a link to the main style sheet file 42corresponding to the basic style selected in step S202 is written to themain data file 43 as style designation.

The monitoring window generated as above can be checked anytime on awindow of monitoring window list from the management client 5 or themonitoring stations 4 by accessing to the management service server 6.

FIG. 16 shows an example of a window showing a monitoring window list.When the management client 5 or monitoring station 4 accesses to themonitoring window list, the management service server 6 sends the list,and the management client 5 or monitoring station 4 displays the list.Reference numeral 160 denotes a monitoring window list; 161, ageneration button for launching a monitoring wizard for generating a newmonitoring window; 162, a delete button for deleting an existingmonitoring window; 163, a display button for displaying and utilizing amonitoring window; and 164, an edit button for editing an existingmonitoring window.

When the display button 163 is depressed, the management client 5 ormonitoring station 4 sends ID of the selected monitoring window to themanagement service server 6, thereby requests the monitoring window. Themanagement service server 6 receives the ID and sends the main data file45 corresponding to the requested monitoring window to the managementclient 5 or monitoring station 4. The management client 5 or monitoringstation 4 receives the file, generates, displays, and executes themonitoring window as described with reference to the flow chart shown inFIGS. 5 and 6. It should be noted that the monitoring window may bereselected in response to an instruction from the management client 5 ormonitoring station 4.

According to the second embodiment as described above, similarly to thefirst embodiment, when, e.g., a style sheet file is replaced by anotherone, the display syle of the monitoring window can be changed. Also, bychanging data files, the monitoring window having a given display stylecan be generated for different camera layouts and arrangements.

In the second embodiment, the management client 5 generates a monitoringwindow. However, it is possible to configure the monitoring stations 4so as to be capable of generating monitoring window.

Further, in order to give authorization for generating, editing, anddeleting monitoring windows to a specific client (in the secondembodiment, the management client 5), the management client to which theauthorization is to be given may be registered in the management serviceserver 6 in advance, clients connecting to the management service server6 may be classified by passward, or other known methods may be used.

As described above, according to the second embodiment of the presentinvention, an end user can easily generate a video display windowsuitable for the purpose intended without installing a specific softwaretool with low cost.

Other Embodiment

Further, the object of the present invention can also be achieved byproviding a storage medium storing program codes for performing theaforesaid processes to a computer system or apparatus (e.g., a personalcomputer), reading the program codes, by a CPU or MPU of the computersystem or apparatus, from the storage medium, then executing theprogram.

In this case, the program codes read from the storage medium realize thefunctions according to the embodiments, and the storage medium storingthe program codes constitutes the invention.

Further, the storage medium, such as a floppy disk, a hard disk, anoptical disk, a magneto-optical disk, CD-ROM, CD-R, a magnetic tape, anon-volatile type memory card, and ROM can be used for providing theprogram codes.

Furthermore, besides aforesaid functions according to the aboveembodiments are realized by executing the program codes which are readby a computer, the present invention includes a case where an OS(operating system) or the like working on the computer performs a partor entire processes in accordance with designations of the program codesand realizes functions according to the above embodiments.

Furthermore, the present invention also includes a case where, after theprogram codes read from the storage medium are written in a functionexpansion card which is inserted into the computer or in a memoryprovided in a function expansion unit which is connected to thecomputer, CPU or the like contained in the function expansion card orunit performs a part or entire process in accordance with designationsof the program codes and realizes functions of the above embodiments.

In a case where the present invention is applied to the aforesaidstorage medium, the storage medium stores program codes corresponding tothe flowcharts in FIGS. 5 and 6, and/or 10 or 15 described in theembodiments.

The present invention is not limited to the above embodiments andvarious changes and modifications can be made within the spirit andscope of the present invention. Therefore to apprise the public of thescope of the present invention, the following claims are made.

1. An image display apparatus for selecting an arbitrary image sensingdevice from one or more image sensing devices connected, and displayinga video obtained from the selected image sensing device, comprising:first memory for holding management data which contains at least a name,identification number, and connection information of each image sensingdevice, and is described in a data description language; second memoryfor holding a display style of the management data, which is describedin a style designation language; and data description means fordescribing management data in the data description language, and storingthe data in said first memory.
 2. The apparatus according to claim 1,further comprising: means for reading out the management data from saidfirst memory; means for reading out the display style from said secondmemory; and a data display unit for displaying by applying the readoutmanagement data to the readout display style.
 3. The apparatus accordingto claim 2, further comprising: selection means for selecting anarbitrary image sensing device from the image sensing devices; and imagecomposition unit for composing and displaying a video obtained by theimage sensing device selected by said selection unit together with thedisplay contents of said data display unit.
 4. The apparatus accordingto claim 1, wherein a function of the image sensing device includes atleast one of a pan angle, tilt angle, zoom ratio, and image quality, andcan be controlled, and the display style of the management data includesa style of an operation display for controlling the function.
 5. Theapparatus according to claim 1, wherein the display style of themanagement data includes a map display indicating a layout of the imagesensing devices.
 6. The apparatus according to claim 1, wherein theimage sensing devices and said image display apparatus are connected viaa network.
 7. The apparatus according to claim 1, wherein said datadescription language is XML (eXtensible Markup Language).
 8. Theapparatus according to claim 1, wherein said style description languageis XSL (eXtensible Stylesheet Language).
 9. An image display systemcomprising: one or more image sensing devices; first memory for holdingmanagement data which contains at least a name, identification number,and connection number of each image sensing device, and is described ina data description language; second memory for holding a display styleof the management data, which is described in a style designationlanguage; data description means for describing management data in thedata description language, and storing the data in said first memory;means for reading out the management data from said first memory; meansfor reading out the display style from said second memory; and a datadisplay unit for displaying by applying the readout management data tothe readout display style.
 10. The system according to claim 9, furthercomprising: selection means for selecting an arbitrary image sensingdevice from the image sensing devices; and image composition means forcompositing and displaying a video obtained by the image sensing deviceselected by said selection means together with the display contents ofsaid data display unit.
 11. The system according to claim 9, wherein afunction of the image sensing device includes at least one of a panangle, tilt angle, zoom ratio, and image quality, and can be controlled;and the display style of the management data includes a style of anoperation display for controlling the function.
 12. The system accordingto claim 9, wherein the display style of the management data includes amap display indicating a layout of the image sensing devices.
 13. Thesystem according to claim 9, wherein the image sensing devices areconnected via a network.
 14. The system according to claim 9, whereinsaid data description language is XML (eXtensible Markup Language). 15.The method according to claim 9, wherein said style description languageis XSL (eXtensible Stylesheet Language).
 16. An image display method inan image display system for displaying a video obtained from anarbitrary image sensing device of one or more image sensing devicesconnected, having first memory for holding management data whichcontains at least a name, identification number, and connection numberof each image sensing device, and is described in a data descriptionlanguage, second memory for holding a display style of the managementdata, which is described in a style designation language, and a datadisplay unit, comprising: the first read-out step of reading out themanagement data of an image sensing device from said first memory; thesecond read-out step of reading out the display style of the managementdata from said second memory; and the display step of displaying byapplying the management data to the display style.
 17. The methodaccording to claim 16, further comprising; the selection step ofselecting an arbitrary image sensing device from the image sensingdevices; and the image composition step of composing and displaying avideo obtained by the selected image sensing device together with thedisplay contents at the display step.
 18. The method according to claim16, further comprising the data description step of describingmanagement data in the data description language, and storing the datain the first memory.
 19. The method according to claim 16, wherein thedisplay step includes the step of compositing and displaying a videoobtained from the selected image sensing device.
 20. The methodaccording to claim 16, wherein a function of the image sensing deviceincludes at least one of a pan angle, tilt angle, zoom ratio, and imagequality, and can be controlled, and the display style of the managementdata includes a style of an operation display for controlling thefunction.
 21. The method according to claim 16, wherein the displaystyle of the management data includes a map display indicating a layoutof the image sensing devices.
 22. The method according to claim 16,wherein the image sensing devices and the data display unit areconnected via a network.
 23. The method according to claim 16, whereinsaid data description language is XML (eXtensible Markup Language). 24.The apparatus according to claim 16, wherein said style descriptionlanguage is XSL (eXtensible Stylesheet Language).
 25. A computer programproduct comprising a computer usable medium having computer readableprogram code means embodied in said medium for an image display methodin an image display system for displaying a video obtained from anarbitrary image sensing device of one or mare image sensing devicesconnected, having first memory for holding management data whichcontains at least a name, identification number, and connection numberof each image sensing device, and is described in a data descriptionlanguage, second memory for holding a display style of the managementdata, which is described in a style designation language, and a datadisplay unit, said product including: first computer readable programcode means for reading out the management data of an image sensingdevice from said first memory; second computer readable program codemeans for reading out the display style of the management data from saidsecond memory; and third computer readable program code means fordisplaying by applying the management data to the display style.